Breathing regulator



FIG. 1 is a top left perspective view of a breathing regulator showingmy new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view;

FIG. 4 is a right side plan view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The ornamental design for a breathing regulator, as shown and described.